Protector mechanism for looms



April 13, 1937. J. P. CAMPS PROTECTOR MECHANISM FOR LOOMS 4 Sheets-Sheet 1 Filed Aug. 16, 1934 April 13, 1937.

Filed Aug. 16, 1934 4 Sheets- Sheet 2 Jiz $121 1.-

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PROTECTOR MECHANISM FOR LOOMS Filed Aug. 16, 1934 4 Sheets-Sheet 3 FIG. 6.

April 13, 1937. l J. P. CAMPS 2,077,037

I f PROTECTOR MECHANISM FOR LQOMS Filed Aug. 16, 1954 4 Sheets-Sheet 4 patented Apr. 13, 1937 UNITED STATES PATENT OFFICE Application August 16, 1934, Serial No. 740,186 In Germany October 10, 1933 2 Claims. (C1. 139-341) In the ordinary looms of the stop lever system the shuttle control is obtained by the oscillation of the tongue of the swell in contact with the shuttle; the slotted levers are lifted as a result of this oscillation, the amplitude of which being determined by the width of the loom itself. The race way movement produces a force of inertia in the lever mechanism, to overcome which a spring is necessary. It will be understood that with the increase of the revolutions of the loom itself, also the above force of inertia will increase, to counteract which a greater force will be needed, the result being that the movement of the shuttle will be braked because the whole lever mechanism will have to work for introducing the shuttle into the box. That this drawback exists in this type of loom is demonstrated by the fact that such looms cannot work at a speed greater than 200 shuttle trips per minute. It is clear that, as the shuttle becomes worn out, the

device will have to be adjusted so that the shuttle acts on the stop lever as much as necessary to keep sufficient distance between the same stop lever and the loom lever.

5 The braking action on the shuttle, owing to its having to move the aforementioned stop lever device, has as well the drawback that, on starting the loom, it is generally necessary to push the raceway so that it starts immediately;

in some cases the shuttle does not enter the shuttle box with sufficient force, and therefore a braking action occurs before the shuttle reaches,

the end of its travel, with the resultant drawback that the stop lever will not lift sufficiently over the loom stop, missing the connection and stopping the loom.

To eliminate all these drawbacks, a new device has been designed, which is illustrated by way of example in the accompanying drawings in which:

Fig. 1 shows a side view of this device on one side of the loom.

Fig. 2 is a side view of the general arrangement of the device with the crank shaft and with .45 the shuttle in the batten box.

Fig. 3 shows the device with the batten in its I extreme forward position and shuttle in the box.

Fig. 4 shows the device coming into action at the moment when the shuttle fails to enter the box.

Fig. 5 shows the device with the crank shaft in advanced position and showing the movement of the device and the connection of the stop lever when the shuttle fails to enter the box. D Fig. 6 is a front view of the device together with batten.

Fig. '7 is a plan view of the device.

Fig. 8 is a perspective view of the stop motion mechanism.

In the drawings I designates the shuttle, 2 the shuttle guide, 3 the raceway carried by corner posts 25, 25', 6 a shaft mounted in brackets 4, 4' on the under side of the raceway 3, 5 is a rocker lever mounted on one end of this shaft 6, l is a bell crank lever oscillatable on a bolt 9 in the loom frame 26, 26', 8 a roller on this lever 1 bearing against a. cam face on the inner end of the longer arm'of a two-armed lever 53 pivotally mounted on a bolt Hip A spring II tends to maintain the two-armed lever It in a predetermined position; I4 is a roller mounted on the end of a pawl l5 mounted on a bolt [6 carried by one of the corner posts 25, 25', this roller M bearing by gravity against the extremity of the long arm of the-two-armed lever l3; I1 is a catch lever pivotally mounted on a bolt H! in the loom frame. The oscillating movement of the lever ll is limited by an abutment bolt l9 adapted to bear against the frame. The lever ll carries a bolt 20 carrying a connecting part 2| by means of which the bolt 20 is connected with a brake rod 22. I2 is a spring connecting the short end of the two-armed lever l3 with the catch lever I]. .23 designates the loom crank shaft journalled in the machine frame 26, 21, which is connected with the corner posts by means of connecting rods 24, 24 mounted on the bolts l6. 3! is an element mounted on the other end of the shaft 6. A shaft 38 is fixed on the element 3| by a nut 29 and this shaft carries a roller which bearsagainst a race 21 mounted on the frame 26. A spring 30 is connected to the shafts 6 and 30 and maintains the roller in contact with the race 21. A rod is mounted on one end of the rocker lever 5 and to the element 3|, this rod having at its ends projections 32, 32' which protrude above the top of the loom tongue swell mounted on a bolt 35 carried by a lever 36 pivotally mounted on a shaft 31.

The mechanism operates in the following manner:

The spring l2 between the short arm of the twoarmed lever l3 and the loom frame 26 keeps the long arm of. thislever in horizontal position in contact with the roller 8 on the bell crank lever 1. When the lever. I3 is in this position, the roller [4 carried by the pawl I5 bears against the end of the long arm of the lever l3 which is wedgeshaped as shown in Figs. 1 to 5. As long as the bell crank lever 1 remains lifted, the raceway 3 will be able to work freely, the roller l 4 of the pawl l 5 bears on the two-armed lever l3, thus keeping the pawl out of engagement with the notch in the catch lever H. The bolt l9 screwed on the end of the short arm of the catch lever l1 serves to keep this lever in its proper position. A rod controlling the loom brake is connected with the longer arm of the catch lever ll by a connecting part 2| mounted on the bolt 20. However, when the two-armed lever I3 is not in its lifted position, the pawl 5 will be free to descend, and to engage in the notch in the end of the lever I1. Thus a pull is exerted on the rod 22 in the direction of motion of the raceway. The rod 22 in turn acts on the loom brake so that the loom is instantaneously stopped.

When the shuttle is in the box, that is when the loom is working normally, the two-armed lever I3 will always be in the position shown in Figs. 2-3 and 4, and therefore the pawl I5 will not engage the notch in the catch H. The bellcrank lever 1 carries a roller 8, which rolls on the cam face of the lever I3. The end of the lever 1 carries a spring H which forces the lever to assume the position shown in Figs. 2-3 and 4. When the shuttle is not in the box the rocker lever 5 rocks and contacts with the extremity of the lever 1 and causes the roller 8 to roll on the cam face and press downwards the long arm of the two-armed lever it so that at this precise moment the roller 14 descends, causing the pawl to swing downwards and engage with the notch in the catch lever IT as already described and as shown on Figs. 4 and 5.

Figs. 2 and 3 show that, when the shuttle is in the box there is no movement of lever 1, therefore the pawl l5 can move freely, and the looms work normally. On the other hand, in Figs. 4 and 5 is shown how, when the shuttle fails to enter the box, the lever 1 operates because then the device mounted on the lower part of the raceway comes into action.

On the lower side of the raceway the shaft 6 is mounted by means of brackets 4 and 4 (Figs. 6 and 7). At one end of the shaft 6 the rocker lever 5 and element 3| are fixed. On the extreme end of the element 3| a rod is mounted, as shown in front elevation in Fig. 6 and in plan in Fig. 7, with projections 32, 32 at its ends as shown in Fig. 6 adapted to project from the top of the raceway, as shown in Figs. 6 and 7 when the shuttle happens not to be in the box. Element 3| has a second arm which connects it with the roller 28 by means of the bolt 29, this roller rolling on the race 21 which is fixed at its ends on the loom frame 26, as shown in Fig. 1. One end of the spring 30 is fixed to the shaft 6, and the other end to the shaft 28, so that a pressure is exerted by the shuttle when it is in the box, and in the contrary case, it will cause an oscillating movement of shaft 6 until the projections 32, 32' project over the raceway as shown in Fig. 6. This movement or pressure as mentioned above will take place when the raceway is in the position indicated in Fig. 1, that is when the shuttle has reached the end of its travel, that is when it enters the box.

When the crank shaft has maximum lag, the roller 28 will roll against the race 21 as shown in Fig. 1. When, for any reason, the shuttle has failed to enter the box, and the raceway is in the position indicated in Figs. 1 and 4, the spring 30 will impart, as explained before, an oscillating movement to the shaft 6, which will oblige the rocker lever 5 fixed on it to assume the position indicated in Figs. 4 and 5.

By reason of the individual movement of the loom the rocker lever 5 will contact with the end of the bell-crank lever I and oblige it to carry out an oscillating movement corresponding to that of the raceway. The roller 8 on the lever 1 rolls on the cam face of the two-armed lever l3 and imparts to it an oscillating movement, which will produce the lowering of the loom pawl l5 until it engages the notch in the catch lever I! so that the instantaneous stoppage of the whole mechanism is produced by means of the rod 22 which commands the loom brake, as explained before.

I claim:-

1. A protector mechanism for looms for automatically stopping the loom when the shuttle does not enter the shuttle box, comprising in combination with the loom frame and the shuttle box, corner posts carrying said shuttle box, means for oscillating said corner posts, a catch lever oscillatable on said frame, a brake actuating rod hingedly connected to said catch lever, a pawl on said corner posts adapted during the oscilla tion of said posts to engage and oscillate said catch lever to exert a pull on said rod, a twoarmed lever oscillatable on said frame and adapted to normally support said pawl out of engagement with said catch lever, a bell crank lever oscillata'ble on said frame, a roller on one arm of said lever resting against one arm of said two-armed lever, and a rocker lever on the under side of said shuttle box adapted when the shuttle does not enter the box to engage and oscillate said two-armed lever to swing said two-armed lever through the intermediary of said roller and lower said pawl into engagement with said catch lever and, when the shuttle enters the box, to rock out of the path of movement of said two-armed lever.

2. A protector mechanism for looms for automatically stopping the loom when the shuttle does not enter the shuttle box, comprising in combination with the loom frame and the shuttle box, corner posts carrying said shuttle box, means for oscillating said corner posts, a catch lever oscillatable on said frame, a brake actuating rod hingedly connected to said catch lever, a pawl on said corner posts adapted during the oscillation of said posts to engage and oscillate said catch lever to exert a pull on said rod, a twoarmed lever oscillatable on said frame, a spring connecting said catch lever with one arm of said two-armed lever and adapted to maintain said catch lever in the path of movement of said pawl and to maintain the other arm of said two-armed lever in horizontal position to support said pawl out of engagement with said catch lever, a bell crank lever oscillatable on said frame, a spring connecting one arm of said bell crank lever with said frame and adapted to maintain the other arm of said lever in vertical position, a roller on the vertical arm of said bell crank lever bearing on the horizontal arm of said two-armed lever, and a rocker lever on the under side of said shuttle box adapted, when the shuttle enters the box, to rock out of the path of movement of the vertical arm of said bell-crank lever and when the shuttle does not enter the box to engage the vertical arm of said bell-crank lever to rock this lever against the action of its spring and through the intermediary of said roller to press downwards the horizontal arm of said two-armed lever against the action of the spring connecting said two-armed lever with said catch lever to lower said pawl into engagement with said catch lever.

JUAN PICANOL CAMPS. 

